Discoid Roaches vs Dubia Roaches: The Honest Comparison

I've fed both species for years, and I'll save you the suspense: for the animal in your enclosure, discoid roaches and dubia roaches are interchangeable. They're the two best feeder roaches in the hobby, they deliver nearly identical nutrition, and most reptiles can't tell them apart. The choice almost always comes down to one thing, and it isn't nutrition.

The nutrition is a near-tie

People expect a clear winner here. There isn't one.

Dubia carry a few points more protein; discoids hold a bit more water. Both are phosphorus-heavy like nearly every feeder insect, which means both still need calcium dusting before feeding off. There is no meaningful nutritional reason to prefer one over the other. Treat them as the same feeder with two names.

Legality is the real decision

This is where the comparison stops being a tie.

Discoid roaches (Blaberus discoidalis) are legal in all 50 states. No permits, no restrictions, anywhere.

Dubia roaches (Blaptica dubia) are banned in Florida and effectively banned in Hawaii. Florida classifies dubia as a non-native invasive risk because the state's subtropical climate could let escaped colonies establish outdoors. Possessing or selling them in Florida can mean confiscation and fines. For one of the largest reptile-keeping communities in the country, that single fact settles the debate: discoids are the only legal roach feeder. You can check the current regulated-species list through the Florida Fish and Wildlife Conservation Commission directly.

Even outside Florida, the nationwide legality of discoids is peace of mind. You never have to track shipping restrictions or worry about a rule change.

Size, looks, and behavior

Side by side, the differences are subtle:

• ◆Size: Adult discoids run slightly larger (1.5-2 in) than adult dubia (1.25-1.75 in).
• ◆Color: Adult discoids are lighter brown with faint banding; adult dubia run darker, with males showing more orange wing tone.
• ◆Wings: Males of both have full wings, females have stubs, and neither species can fly.

At nymph sizes, which is what most of us feed, they're genuinely hard to tell apart. Behaviorally they share the traits that make roaches the best feeders going: neither climbs smooth plastic or glass, neither bites, both are silent, and both are essentially odorless with basic care. Discoids tend to run a touch faster, which some keepers swear triggers a stronger feeding strike. It's a minor difference.

Breeding and lifespan

If you plan to breed your own colony, the numbers diverge a little:

• ◆Dubia: ~20-40 nymphs per cycle, roughly 28-35 day gestation. Faster colony growth.
• ◆Discoid: ~25-35 nymphs per cycle, but a longer ~60 day gestation.

Both are ovoviviparous (live birth), both want 85-95°F to breed, and care is otherwise identical. Dubia's faster turnover is a real advantage for colony builders. For anyone who simply buys feeders, it changes nothing. Adults of both live roughly 12-18 months, giving you the long shelf life that makes roaches so much more practical than crickets.

Care is identical

If you can keep one, you can keep the other with zero adjustment: a smooth-sided bin, 80-95°F, egg-crate hides stood on end, water crystals (never an open dish, nymphs drown), and a mix of fresh produce and dry grains. No substrate needed.

So which should you choose?

It comes down to a single question: do you live in Florida or Hawaii?

• ◆Yes: Discoids are your clear and only legal choice, and they match dubia in every way that matters.
• ◆No: Either works. Pick on local price and availability. Want maximum colony output? Dubia. Want a feeder that's legal everywhere, full stop? Discoids.

I keep discoids because I'm in Florida and they're bulletproof legally, nutritionally, and logistically. If you want to start, browse discoid roaches at All Angles Creatures in the size your animal eats.

For more, see why roaches beat crickets and the Florida legality breakdown.